Analysis And Evaluation Of Water Environment For Remediation Of Ion-absorbed Rare Earth Mining Area In South China

In Xunwu,South Jiangxi province,an surrendered particle uncommon soil mine has contaminated the encompassing water and soil environment due to soil disintegration,the consistent discharge of nitrogen compounds and related overwhelming metals,which contains a extraordinary affect on the development of environmental civilization.In arrange to advance fortify the development of biological civilization,the neighborhood government of utilizing environmental emolument reserves,since 2018,the three stage of integration within the surrendered mine environmental environment administration and soil rebuilding in mining designing,surrendered mines encompassing biological reestablished continuously,the sea-going environment quality have been moved forward steadily,to the east "water bowl security has played a positive part.In arrange to advance assess the environmental remediation impact of deserted mines,the progressed water quality file strategy(WQI)and dim social examination strategy were received in this paper to comprehensively assess the spatial and transient variety of different contamination components within the biological remediation zone of surrendered mines.And the dim demonstrate GM(1,1)is utilized to anticipate the water quality of the surrendered mine reclamation work,which gives compelling logical premise and administration recommendations for the ensuing natural administration and environmental reclamation of the deserted uncommon soil mine.(1)The show circumstance of natural administration and environmental reclamation of the deserted mine and its treatment innovation were presented in detail.18 water quality testing focuses were set up within the water bowl and soil remediation extend,and 9 key assessment lists such as smelling salts nitrogen,COD and overwhelming metals were chosen for central component examination and calculate investigation.(2)In understanding with the important records measured information appears that the squander of ionic sort rare-earth mines three control squares of the concentration of COD,smelling salts nitrogen contamination from the changes of time and space,through each area of the concentration of COD,alkali nitrogen concentration and the concentration of overwhelming metal discovery,smelling salts nitrogen is the most contamination sources,a lake beginning offered area,two pieces any tree two water passage profile and three squares wastewater gulf area of the extreme contamination more than surface water ? course standard.Each square from the beginning area to the outlet area of contamination steadily decrease,in COD concentration area as a entire and the changes of time and space of alkali nitrogen,the surrendered ionic uncommon soil mine wastewater COD ? lesson does not meet the surface water standard,alkali nitrogen concentration than ? course standard.(3)From surrendered ionic control mine each segment of the three squares of COD concentration and spatial alter of smelling salts nitrogen,the offered administration administration impact is apparent,three administration squares a offered what tree lake wetland expulsion effectiveness of COD and smelling salts nitrogen,the administration of three pieces of COD and smelling salts nitrogen evacuation rate,the lowest offered the administration within the abundant water administration impact is best.The wetland within the treatment segment has certain adsorption capacity for overwhelming metals,whereas the concentration of heavy metal Pb within the treatment section 1 changes incredibly,showing that the plants within the treatment segment of Ke Shutang have destitute adsorption capacity for heavy metal Pb,and the adsorption capacity of Pb and Al within the treatment area 2 is the best.Among the three treatment bid sections,the expulsion impact of COD and alkali nitrogen within the treatment offered area 1 is sweet,but the adsorption impact of overwhelming metals isn't great.The overall impact of the treatment offered segment 3 isn't great.The conceivable reasons are as takes after: The soil disintegration and COD and smelling salts nitrogen contamination within the third offered segment are serious.The third segment is treated by plants being ingested into the sedimentation tank to begin with.Since the landscape of the sedimentation tank is lower than the plant planting range,the length of wastewater within the plant planting zone decreases the adsorption impact of plants.(4)Concurring to foremost component investigation and figure investigation,the most contamination sources influencing the surrendered particle uncommon soil mine are smelling salts nitrogen,COD and Mn,taken after by Pb as contamination variables.Through the investigation of the made strides WQI list assessment strategy,it can be seen that the cross area of the uncommon soil mining zone is anomalous,that's,the single calculate surpasses the national standard esteem as well much.Through gray relationship investigation,the investigation appears that the squander ionic uncommon soil mine wastewater is ? lesson water,the generally water quality is poorer,remains to be assist administration.In October2020 what lake within the center of the lake water gulf segment and what tree ? area water is surface water quality standard,water contamination is serious.In mid-december 2020 pit town sewage outfall segment water is surface water ? course water quality standards.Through the dim show to foresee the water quality in July 2021,through to assess water quality record is? lesson water.